GSH contents were induced significantly in the liver and were decreased significantly in the kidneys with increasing of exposure time,GSH contents were positively correlated with MDA contents in the liver(R~2=0.5933,n=9),while GSH contents were negatively correlated with MDA contents in the kidneys(R~2=0.8609,n=9).
Result The HQ concentrations in the range of 0～320 μmol/L,at same exposure time(6,12,or 24 h),the viabilities of L-02 hepatic cells were gradually decreased in a dose-dependent manner,the higher exposure groups(160 μmol/L and 320 μmol/L)were significantly reduced compared to the control group(0 μmol/L,P<0.01);
The lethal effect sensitivity of embryos incubated after 48 hours was getting lower when the exposure time was getting shorter,the LC 50 being the minimum (70.8 μg·L~ -1) for 0 hpf embryos,and the maximum (831.8 μg·L~ -1) for 24 hpf embryos.
The results show that the rates of immobilized glucose oxidase catalyzed reactions remarkably increase when the reacions were carred out at 0℃,5℃,and 45℃ with a glucose concentration of 1.0×10 -2 mol·L -1 ,as well as at 55℃ with a glucose concentration of 0.1 mol·L -1 .The effects of magnetic field depend on the concentration of substrate and exposure time.
The results indicated that when 2.0~3.0 mg/L of sodium oleate was used at the temperature of 4~37℃, reduction of VSV titer increased from 1.l7lg TCID50 to 4.50 lg TCID50 with increase in concentration of sodium oleate and the temperature, while varia- tion in exposure time from 0.5 to 2 h did not influence significantly the efficacy of inactivating the virus.
According to the percentage of damaged DNA with tail and its TL/D (tail length to diameter of nucleus) value, the relationship between DNA damage degree and heavy metal dose and exposure time was determined.
Results showed that the percentage of damaged DNA and the TL/D value were increased with the prolonged exposure time.
Characteristic variations in the specific activity and isoform pattern of the enzyme were revealed depending on pollutant concentration and exposure time.
The direct schlieren method with an exposure time -3·10-7 s was employed.
Analytic expressions relating the concentration of a light-sensitive component and the intensity of exposure UV light to the sample thickness and exposure time of light-sensitive materials with the restricted mobility of reactants were found.